| 摘要 |
Artificial implants (e.g. artery or vein) for a human body or animal comprises a crimped tube made of collagen or of collagen and a non absorbable fibre. The tube may be straight or Y-shaped. The non absorbable fibre may be a copolymer of vinyl chloride and acrylonitrile, polyvinyl chloride, nylon, polyacrylonitrile, polyethylene terephthalate, polytetrafluoroethylene, polyethylene, polypropylene, cotton or silk. The tubes may be woven, knitted, braided or crocheted. The tube may be crimped by inserting a mandrel in the tube and forcing the ends of the tube together or a wire may be wound round the tube in the mandrel before forcing the ends together. The tube may be set in its crimped state by (1) heating with steam under a pressure of 0 to 18 p.s.i.g.; (2) heating in water at 40 DEG - 100 DEG C; (3) tanning; (4) heating a crimped tube having a water content of at least 10% by weight at 140 DEG to 160 DEG C; or (5) subjecting to radiation and u.v. light. The tanning agent may be chromium, formaldehyde or polyhydroxyphenols.ALSO:Artificial implants (e.g. artery or vein) for a human body or animal comprises a crimped tube made of collagen or of collagen and a non-absorbable fibre. The tube may be straight or Y-shaped. The non-absorbable fibre may be a copolymer of vinyl chloride and acrylonitrile, polyvinyl chloride, nylon, polyacrylonitrile, polyethylene terephthalate, polytertrafluoroethylene, polyethylene, polypropylene, cotton or silk. The tubes may be woven, knitted, braided or crocheted. The tube may be crimped by inserting a mandrel in the tube and forcing the ends of the tube together or a wire may be wound round the tube in the mandrel before forcing the ends together. The tube may be set in its crimped state by (1) heating with steam under a pressure of 0 to 18 psig; (2) heating in water at 40 DEG -100 DEG C; (3) tanning; (4) heating a crimped tube having a water content of at least 10% by weight at 140 DEG to 160 DEG C; or (5) subjecting to radiation and u.v. light. The tanning agent may be chromium, formaldehyde or polyhydroxyphenols.
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